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Todd C. Wehner and Paul C. St. Amand

Gummy stem blight [Didymella bryoniae (Auersw.) Rehm] is the second most important pathogen of field-grown cucumbers (Cucumis sativus L.) in North Carolina and a severe problem for greenhouse-grown cucumbers worldwide. To determine whether resistance exists under North Carolina field conditions, 83 cultigens [cultivars, breeding lines, and plant introduction (PI) accessions] were evaluated in the field for 4 years for their resistance to a mixture of D. bryoniae isolates. Plants were inoculated at the vine tip-over stage and rated for foliar lesion size and number. Cultigens identified as resistant in Wisconsin and The Netherlands were not resistant in North Carolina. When averaged over years and locations, the most resistant C. sativus cultigens were PI 164433, `Slice', PI 390264, M 17, and M 12. Several accessions of related Cucumis species were highly resistant: PI 299568 (C. myriocarpus Naud.), PI 282450 (C. zeyheri Sond.), PI 299572 (C. myriocarpus), and PI 233646 (C. anguria L.). The most susceptible cultivars were `Colet', `Meresto', `Supergreen', `Dura', `Pioneer', `Marketmore 76', `Pickmore', and `Addis'. `Calypso' and `Dasher II', popular cultivars in North Carolina, were moderately susceptible.

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Kagiso Given Shadung, Phatu William Mashela and Maboko Samuel Mphosi

A. Varma (eds.). Organic amendments and soil suppressiveness in plant disease management. Springer Intl. Publ., Heidelberg, Germany Mashela, P.W. De Waele, D. Pofu, K.M. 2011 Use of indigenous Cucumis technology as alternative to synthetic

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Andrés Cáceres, Gorka Perpiña, María Ferriol, Belén Picó and Carmina Gisbert

. longipes (A) (accession BGV12795) and Cucumis myriocarpus (My) (accession BGV008535). The three accessions were held at the COMAV’s Genebank. Hybridizations were conducted in a greenhouse at the UPV, under controlled conditions during the spring

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Cody L. Smith, Joshua H. Freeman, Nancy Kokalis-Burelle and William P. Wechter

cantaloupe ( Cucumis melo L.) demonstrated significant reduction in root gall index (RGI), reproductive factor, and second-stage juveniles (J2) recovered from soil when grafted on RKN-resistant Cucumis metulifer (E. Mey. ex Naud.) ( Guan et al., 2014

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W. Patrick Wechter, Amnon Levi, Kai-Shu Ling, Chandrasekar Kousik and Charles C. Block

) and muskmelon (also called cantaloupe or melon) ( Cucumis melo ). Records show that nearly two billion pounds of muskmelons were produced in the United States in 2008 with a market value of $371 million ( USDA, NASS, 2009 ). Pest and disease pressures